How comets change seasonally and a news roundup

Myrtha Hässig discusses variability and heterogeneity of the coma of comet 67P as part of Science's special issue on the Rosetta spacecraft. Meghna Sachdev discusses daily news stories. Hosted by Susanne Bard. [Img: European Space Agency/Rosetta/NAVCAM] Learn more about your ad choices. Visit megaphone.fm/adchoices